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Restricted Cash Balances	12 Months Ended
Restricted Cash Balances	Dec. 31, 2017
Restricted Cash Balances [Abstract]
Restricted Cash Balances	Note 3. Restricted Cash Balances The Bank is required to maintain reserves against its deposit liabilities in the form of vault cash and/or balances with the Federal Reserve Bank. Deposit reserves that the Bank was required to hold were approximately $7.1 million and $6.4 million at December 31, 2017 and 2016, respectively and were satisfied by the Bank’s vault cash.